Safety-clutch for car-door-operating mechanisms.



,TATBNTED SEPT. 10,

o. A. LINDSTROM. SAFETY OLUTOH `FOR OAR DOOR OPERATING MEOHANISMS.

APPLIOATION FILED JAN. 11. 1907.

C. a. E OQ) WITNESSES UNITED STATES PAirnnT erosion.

CHARLES A. LINDASTRM, Ol* XLLEGHENC PENNSYLVANIA.

SAFETY-CLUTCH FOR CAR-DIOOR-OPERATING MECHANISMS.

No. 865,921. specification of Letters Patent. Patented Sept. 10, 1907.

Original application tiled June 15, 1906, Serial No. 321,794. Divided and this application liled Jantiory l1, 1907.

' Serial No. 351.819.

To all whom it. may concern.: v

Be it known that I, Cnnnnias A. LINns'ruM, of

Allegheny, Allegheny county, Pennsylvania, havel invented a new and useful Safety-Clutch for Car-Door- Operating ll'lechanism, of which the following is a full, clear, and exact description. reference fbeing had tothe accompanying drawings, forming part oi' this specitieation. in which- Figure 1 is a side elevation ol' n portion of a hopper car embodying my invention; and Fig. 2 is n detnil sectional view Showing the clutch.

This application is a. division bi' my applic-.uien Serial No. 321,79-l. tiled .lune lth, i906.

The invention has rel-.ition to a safety device or :clutch for use in connection with freightl ear dropdoor operating mechanism; and has for its object the provision oi n simple and effective device of this character which is arranged to operate to permit the dooroperating shaft to be released to open the doors` after which such shaft is free to move without effect upon the' wrench; thereby obvi-.iting all danger of linjury by reason of the wrench being thrown by `the sudden opening of the doors. V

My invention is applicable to various forms oi' dropdoor operating mechanism, one oi which will now be described. Y

In the drawings, the numeml 2 designates the dooroperating shaft, which is connected in any suitable manner to the crank arm 3 having an operating conlnection 4 with the hinged drop door 5. 'lhisshait is provided with a squared or langular port-ion o upon which is fixed a clutch member having a radially projecting clutch lug- 8, which is adapted to engage 'with a similar lug 9 of a loose clutch member 10, which .ranged to engage n lng or tooth 16 on the clutch member 7 to insure the locking of the door in closed position. This locking is, however, mainly effected by the crunk 3 coming to rind below tht` center line of the shaft 2 when the door is closed, as shown in Fig, l.

17 is the usual safety dog', which prevents the pawl from working out of engagement with the tooth 16' when in closed position.

The clutch member 7 may be provided withr one -l or more addition-.d teeth 1S to Assist in closing the door, these teeth permitting the oper-.nor to change the position oi the wrench which isapplied to the external squared sleeve iii-H oi' the clutch member l0.

To open the door'. the purts being in the position shown in Fig. i. the wrench is applied to the squared sleeve it)n und the clutch member l0 is turned in an anti-clockwise direction until the lug` 9 is brought into engagement with the lugr S, und the lutter is moved n sutiicicut distance to rele-.rse the load on the pawl l5. 'lhe paw-l is then thrown out ot' engagement. and the clutch member it) is turned in the opposite direction until its lug 9 engages the opposite side oi' the lug S. 'und the sliai't'l! is turned sutliciently to curry the crank arm 3 beyond the center line of the .sb-.ift 2. The loud acting on the door now opens the latter and causes n partial revolution ol' the crank nrm 3, and the shalt 2. without turning the clutch member 10, the lugr 8 moving away from the lug il without moving the clutch l member 10.

load may act upon the door after it has been released, there is no danger to the operator, who can remove his wrench at leisure.

I de notlimit myself to the exact construction and arrangement shown. since various changes may be made in the details without departing from the spirit and scope of my invention.

What I claim is:-

1. in car door operatingr mechanism. u door operating shuft, :1 clutch member removably carried by snid shaft 'to turn therewith, und n copernting clutch member in loose relation to the shaft :1nd journnled upon the txed member. the copernting: clutch member beimrurrunged to enguce the fixed member in both directions of movement with un intervening lost motion: substantially ns described. l

2. in car door operating: mechanism, a door operating sbnt. n clni'elrmeminr tixed to suid shaft und iin-ving :l

journnied on Suid extension, Suid loosely joui-nailed clutch member beine: arranged to engage the tixed member in both directions` of movement with un intervening lost motion; substantially ns described.

:L` In cnr door operating mechanism. a door operating sbuft. u clutch member fixed to snid shaft, u brucket in which Suid clutch member is jonrnaied, and o. loose clutch member journuled on'an extension of the tixed clutch meins ber. tbe loose clutch member being arranged to engage the tixed member in both directions of movement with nn in- `ierrenlnr.: lost motion: substuntinlly ns described.

In testimony whereof, I have hereunto set my hand.

` CHARLES A. LNDSTRM. Witnesses z- K. L. ROBINSON, H. B. FISHER.

No mutter. therefore` how quickly the' 

